Metal-Detectable Knobs | McMaster-Carr

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FDA Compliant 21 CFR 177.1500

FDA Compliant 21 CFR 178.3297

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17 Products

Metal-Detectable Threaded-Hole Knobs

Position, tighten, and hold fixtures, equipment, and machinery near food processing lines without the risk of contaminating the food. These knobs contain metal additives that will set off metal detectors if they—or any piece of them—fall into your line. They’re also bright blue, making them easy to spot. Use these knobs to help you comply with Hazard Analysis and Critical Control Point (HACCP) programs for food safety. All are FDA compliant for direct contact with food.

Made of nylon, these knobs resist wear and repel oil, grease, and solvents. Install them on a threaded stud.

Knurled-Head Grip

	Thread		Head, mm		Hub, mm
	Sz.	Dp., mm	Dia.	Ht.	Dia.	Ht.	Insert Material	Temp. Range, ° F	Food Industry Std.		Each
Blue Nylon



		M5 × 0.8 mm	10	21	7.5	12.5	10.5	303 Stainless Steel	-30 to 130	FDA Compliant 21 CFR 177.1500, FDA Compliant 21 CFR 178.3297	00000000	000000


		M8 × 1.25 mm	15	31	10	18.5	17	303 Stainless Steel	-30 to 130	FDA Compliant 21 CFR 177.1500, FDA Compliant 21 CFR 178.3297	00000000	00000

Three-Arm Grip

	Thread		Head, mm		Hub, mm
	Sz.	Dp., mm	Dia.	Ht.	Dia.	Ht.	Insert Material	Temp. Range, ° F	Food Industry Std.		Each
Blue Nylon



		M8 × 1.25 mm	13	40	13.5	16	13.5	304 Stainless Steel	-30 to 130	FDA Compliant 21 CFR 177.1500, FDA Compliant 21 CFR 178.3297	00000000	000000


		M10 × 1.5 mm	17	50	15	19	15	304 Stainless Steel	-30 to 130	FDA Compliant 21 CFR 177.1500, FDA Compliant 21 CFR 178.3297	00000000	00000

Metal-Detectable Threaded-Stud Knobs

Made for use in food processing facilities, these plastic knobs have a metal additive that sets off metal detectors if a piece breaks off into your line. They’re also bright blue, so it’s easy to find and retrieve loose pieces. They help you comply with Hazard Analysis and Critical Control Point (HACCP) programs for keeping contaminated food from leaving your facility.

These knobs give you a secure grip to tighten, position, and hold components in place. Made from nylon, they’re wear resistant and won’t degrade from oil, grease, and solvents. They meet ISO 4753 standards for the ends of threaded parts, and they’re FDA compliant for direct food contact. Mount them into a threaded hole.

Three-Arm Grip

Image of Product. Front orientation. Knobs. Metal-Detectable Threaded-Stud Knobs.

			Head, mm		Hub, mm
	Thread Size	Stud Lg., mm	Dia.	Ht.	Dia.	Ht.	Stud Material	Temp. Range, ° F	Food Industry Std.	Specs. Met		Each
Blue Nylon



		M8 × 1.25 mm	20	40	13.5	16	13.5	304 Stainless Steel	-30 to 130	FDA Compliant 21 CFR 177.1500, FDA Compliant 21 CFR 178.3297	ISO 4753	0000000	000000


		M8 × 1.25 mm	30	40	13.5	16	13.5	304 Stainless Steel	-30 to 130	FDA Compliant 21 CFR 177.1500, FDA Compliant 21 CFR 178.3297	ISO 4753	0000000	00000
		M10 × 1.5 mm	30	50	15	19	15	304 Stainless Steel	-30 to 130	FDA Compliant 21 CFR 177.1500, FDA Compliant 21 CFR 178.3297	ISO 4753	0000000	00000
		M10 × 1.5 mm	40	50	15	19	15	304 Stainless Steel	-30 to 130	FDA Compliant 21 CFR 177.1500, FDA Compliant 21 CFR 178.3297	ISO 4753	0000000	00000

Metal-Detectable Tapered Lever Handles

These handles are often used as grips on hand wheels or cranks to operate machinery around food processing lines without the risk of contaminating the food. They contain metal additives that will set off metal detectors if they—or any piece of them—fall into your line. They’re also bright blue, making them easy to spot. These handles help you comply with Hazard Analysis and Critical Control Point (HACCP) programs for food safety. They’re also FDA compliant for direct contact with food.

Made of nylon, these handles resist wear and repel oil, grease, and solvents. Install them on a threaded stud.

Threaded Hole

	Thread			Dia., mm		Temp., ° F
	Size	Dp., mm	Handle Lg., mm	(A)	(B)	Min.	Max.	Food Industry Std.		Each
Blue Nylon



		M10 × 1.5 mm	55	80	26	21	-20	110	FDA Compliant 21 CFR 177.1500, FDA Compliant 21 CFR 178.3297	0000000	000000

Metal-Detectable Adjustable Handles


Threaded Stud	Threaded Hole

Use these handles for applications involving frequent positioning, tightening, and holding adjustments near food processing lines without the risk of contaminating the food. Also known as clamping handles, they contain metal additives that will set off metal detectors if they fall into your line. All are bright blue, making them easy to spot. These handles help you comply with Hazard Analysis and Critical Control Point (HACCP) programs for food safety. They’re also FDA compliant for direct contact with food.

Made of nylon, these handles resist wear and repel oil, grease, and solvents. Lift the handle to rotate freely; then release the handle to engage and tighten.

Threaded Stud

Threaded-stud handles mount into a threaded hole.

	Stud Lg., mm	Handle Lg., mm	Projection, mm	Hub Projection, mm	Stud Material	Temp. Range, ° F	Color	Food Industry Std.		Each
Nylon



	M6 x 1 mm	16	63	38.5	31	303 Stainless Steel	-30 to 130	Blue	FDA Compliant 21 CFR 177.1500, FDA Compliant 21 CFR 178.3297	0000000	000000


	M6 x 1 mm	25	63	38.5	31	303 Stainless Steel	-30 to 130	Blue	FDA Compliant 21 CFR 177.1500, FDA Compliant 21 CFR 178.3297	0000000	00000
	M8 x 1.25 mm	20	78	45	36	303 Stainless Steel	-30 to 130	Blue	FDA Compliant 21 CFR 177.1500, FDA Compliant 21 CFR 178.3297	0000000	00000
	M8 x 1.25 mm	40	78	45	36	303 Stainless Steel	-30 to 130	Blue	FDA Compliant 21 CFR 177.1500, FDA Compliant 21 CFR 178.3297	0000000	00000

Threaded Hole

Threaded-hole handles install on a threaded stud.

	Thread
	Size	Dp., mm	Handle Lg., mm	Projection, mm	Hub Projection, mm	Insert Material	Temp. Range, ° F	Color	Food Industry Std.		Each
Nylon



		M6 x 1 mm	10	63	38.5	31	303 Stainless Steel	-30 to 130	Blue	FDA Compliant 21 CFR 177.1500, FDA Compliant 21 CFR 178.3297	0000000	000000


		M8 x 1.25 mm	14	78	45	36	303 Stainless Steel	-30 to 130	Blue	FDA Compliant 21 CFR 177.1500, FDA Compliant 21 CFR 178.3297	0000000	00000

Metal-Detectable Threaded Through-Hole-Mount Pull Handles

Open and close a variety of doors and drawers on machines and equipment next to food processing lines while reducing the risk of contaminating the food. To help you comply with Hazard Analysis and Critical Control Point (HACCP) programs for food safety, these handles contain metal additives that will set off metal detectors. They’re also bright blue, making them easy to spot if they fall into your line. All are FDA compliant for direct contact with food.

Made of nylon, these handles resist wear and repel oil, grease, and solvents. Their rectangular grip has a flat surface that keeps your hand from slipping. Thread screws through holes from the back of your surface into the handles to install them.

	Mounting Hole				Grip, mm
	No. of	Ctr.-to-Ctr. Wd., mm	Wd., mm	Thread Size	Ht.	Thk.	Projection, mm	Pull Cap., lbf	Mounting Fasteners Included	Food Industry Std.		Each
Rectangular Grip







				Blue Nylon with Stainless Steel Insert

				2	117	134	M8 × 1.25 mm	25	15	49	1,010	No	FDA Compliant 21 CFR 177.1500 FDA Compliant 21 CFR 178.3297	0000000	000000


				2	179	196	M8 × 1.25 mm	27	16	57	670	No	FDA Compliant 21 CFR 177.1500 FDA Compliant 21 CFR 178.3297	0000000	00000