McMaster-Carr logo
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    55 Products

    Retaining Caps

    Image of Product. 1050 Spring Steel. Bottom orientation. Protective Caps. Retaining Caps.
    Image of Product. Plastic. Bottom orientation. Protective Caps. Retaining Caps.

    1050 Spring Steel

    Plastic

    Image of Product. Bottom orientation. Protective Caps. Retaining Caps, 400 Series Stainless Steel.

    400 Series

    Stainless

    Steel

    Use these caps to hold components in place and protect shaft ends. Install these caps with a hammer or push them into place by hand.
    Corrosion-Resistant Coated—Corrosion-resistant-coated finish is more corrosion resistant in wet environments than zinc-plated finish. Also known as black luster.
    Nickel Plated—Nickel-plated finish has excellent corrosion resistance and a decorative appearance.
    Zinc Plated—Zinc-plated finish is corrosion resistant in wet environments.
    For
    OD
    OD
    Ht.
    Insert Material
    Min.
    Hardness
    Temp. Range,
    ° F
    Pkg.
    Qty.
    Pkg.
    Black Corrosion-Resistant-Coated 1050 Spring Steel
    1/4"9/16"7/32"SteelNot Rated—597036A01000000
    5/16"5/8"1/4"SteelNot Rated—597036A0200000
    3/8"3/4"9/32"SteelNot Rated—597036A03000000
    1/2"15/16"21/64"SteelNot Rated—597036A04000000
     
    Nickel-Plated 1050 Spring Steel
    3/8"3/4"9/32"SteelRockwell C13—2594803A0310000
     
    Zinc-Plated 1050 Spring Steel
    5/16"9/16"19/64"SteelRockwell C44—2594803A3200000
    1/2"15/16"21/64"SteelRockwell C38—1094803A0500000
    5/8"1 3/16"27/64"SteelRockwell C38—1094803A0600000
     
    400 Series Stainless Steel
    1/8"27/64"1/8"18-8 Stainless Steel
    		Rockwell C49—1094802A1000000
    3/16"1/2"5/32"18-8 Stainless Steel
    		Rockwell C49—2594802A1100000
    1/4"41/64"13/64"18-8 Stainless Steel
    		Rockwell C49—1094802A1200000
    3/8"25/32"15/64"18-8 Stainless Steel
    		Rockwell C49—1094802A14000000
     
    Black Plastic
    5/32"21/32"23/64"SteelRockwell C45-90 to 1505090310A32500000
    3/16"21/32"23/64"SteelRockwell C45-90 to 1505090310A33500000
    1/4"27/32"23/64"SteelRockwell C45-90 to 1505090310A34500000
    5/16"27/32"29/64"SteelRockwell C45-90 to 1502590310A35500000
    3/8"55/64"15/32"SteelRockwell C45-90 to 1502590310A3780000
    7/16"53/64"7/16"SteelRockwell C45-90 to 1501090310A3720000
    1/2"1 5/16"41/64"SteelRockwell C45-90 to 1501090310A3730000
    5/8"1 5/16"41/64"SteelRockwell C45-90 to 1501090310A3740000
     
    White Plastic
    1/8"21/32"23/64"SteelRockwell C45-90 to 1501090310A31500000
    3/16"21/32"11/32"SteelRockwell C45-90 to 1502590310A3710000
    3/8"55/64"15/32"SteelRockwell C45-90 to 1502590310A3770000
     
    Red Plastic
    5/16"55/64"15/32"SteelRockwell C45-90 to 1502590310A3760000
     

    Flanged Push Nuts for Unthreaded Shafts

    Image of Product. Front orientation. Push Nuts. Flanged Push Nuts for Unthreaded Shafts.
    The wide flange provides better load distribution than standard push nuts and can be used to cover oversized holes. Also known as thread cutting nuts. Use them on unhardened shafts that are softer than the push nut. The nut bites into the metal to form an interference grip.
    For
    OD
    Hex
    Wd.
    Ht.
    Flange
    Dia.
    Min.
    Hardness
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated 1050 Spring Steel
    1/8"5/16"3/16"7/16"Rockwell C4110090533A13100000
    1/8"5/16"13/64"17/32"Rockwell C4110090533A13200000
    5/32"3/8"13/64"9/16"Rockwell C4110090533A15000000
    3/16"3/8"7/32"1/2"Rockwell C4110090533A13300000
    3/16"3/8"15/64"5/8"Rockwell C4110090533A13400000
    1/4"7/16"15/64"19/32"Rockwell C4110090533A13500000
    1/4"7/16"15/64"11/16"Rockwell C4110090533A13600000
    5/16"1/2"5/16"7/8"Rockwell C415090533A14000000
     

    Quick-Release Pin Retaining Caps

    Press a retaining cap onto the end of a pin to hold it in a hole that's oversized or out of round. They're made of 18-8 stainless steel for a balance of strength and corrosion resistance.
    Quick-Release Pin Retaining Caps
    Image of ProductInUse. Front orientation. Quick-Release Pin Retaining Caps.
    Image of Product. Front orientation. Quick-Release Pin Retaining Caps.
    Passivated—Caps that are passivated offer added protection against corrosion and oxidation.
    For Pin
    Dia.
    Cap OD
    Overall
    Lg.
    Usable Lg.
    Reduction
    Material
    Passivation
    Each
    3/16"3/8"9/16"1/8"18-8 Stainless Steel
    		Passivated90487A250000000
    1/4"3/8"9/16"1/8"18-8 Stainless Steel
    		Unpassivated90487A21300000
    5/16"1/2"5/8"1/8"18-8 Stainless Steel
    		Unpassivated90487A21700000
    3/8"9/16"3/4"3/16"18-8 Stainless Steel
    		Unpassivated90487A22100000
    1/2"3/4"1"1/4"18-8 Stainless Steel
    		Unpassivated90487A22500000
    5/8"1"1 1/4"1/4"18-8 Stainless Steel
    		Passivated90487A25100000
    6 mm9.5 mm14.7 mm3 mm18-8 Stainless Steel
    		Passivated90487A25800000
    8 mm12.7 mm15.9 mm3 mm18-8 Stainless Steel
    		Passivated90487A25900000
    10 mm14.3 mm18.5 mm5 mm18-8 Stainless Steel
    		Passivated90487A26000000
    12 mm19.1 mm25.4 mm6 mm18-8 Stainless Steel
    		Passivated90487A26100000
    16 mm25.4 mm31.8 mm6 mm18-8 Stainless Steel
    		Passivated90487A26200000
    Quick-Release Pin Retaining Caps with Screw
    Image of ProductInUse. Front orientation. Quick-Release Pin Retaining Caps.
    Image of Product. Front orientation. Quick-Release Pin Retaining Caps.
    Caps with screw included provide a convenient attachment point for a lanyard (sold separately).
    Passivated—Caps that are passivated offer added protection against corrosion and oxidation.
    For Pin
    Dia.
    Cap
    OD
    Overall
    Lg.
    Usable Lg.
    Reduction
    Material
    Passivation
    Each
    3/16"3/8"9/16"1/8"18-8 Stainless Steel
    		Passivated90487A252000000
    1/4"3/8"9/16"1/8"18-8 Stainless Steel
    		Passivated90487A25300000
    5/16"1/2"5/8"1/8"18-8 Stainless Steel
    		Passivated90487A25400000
    3/8"9/16"3/4"3/16"18-8 Stainless Steel
    		Passivated90487A25500000
    1/2"3/4"1"1/4"18-8 Stainless Steel
    		Passivated90487A25600000
    5/8"1"1 1/4"1/4"18-8 Stainless Steel
    		Passivated90487A25700000
    Lanyards
    Each
    6" Lg. Lanyard for 3/8" to 3/4" OD Caps30345T52800000
    12" Lg. Lanyard for 3/8" to 3/4" OD Caps30345T5350000
    18" Lg. Lanyard for 3/8" to 3/4" OD Caps30345T5380000
    12" Lg. Lanyard for 1" OD Caps30745T44900000
    24" Lg. Lanyard for 1" OD Caps30745T47700000
    3 ft. Lg. Lanyard for 1" OD Caps30745T48900000
    back to top