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CA21057-1C — NUT SPACER,PLATE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

CA21057-1C: NUT SPACER,PLATE.

The NUT SPACER,PLATE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OR STEEL COMP 304 OVERALL, nut_style: PLATE NUT SPACER, nut_length: 0.905 INCHES MINIMUM AND 0.949 INCHES MAXIMUM IN, plate_width: 0.540 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN, plate_thickness: 0.032 INCHES MINIMUM AND 0.038 INCHES MAXIMUM IN, special_features: REMOVABLE SHIM BONDED TO SPACER ON COUNTERSINK SIDE. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-083-4119, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
CA21057-1C
NSN: 5310-01-083-4119
FSC: 5310 — Nuts and Washers
CAGE: 29372 — HOWMET GLOBAL FASTENING SYSTEMS INC. DIV TRIDAIR PRODUCTS (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 304 OVERALL
nut_stylePLATE NUT SPACER
nut_length0.905 INCHES MINIMUM AND 0.949 INCHES MAXIMUM IN
plate_width0.540 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN
plate_thickness0.032 INCHES MINIMUM AND 0.038 INCHES MAXIMUM IN
special_featuresREMOVABLE SHIM BONDED TO SPACER ON COUNTERSINK SIDE
surface_treatmentPLASTIC OVERALL
thru-hole_diameter0.463 INCHES MINIMUM AND 0.473 INCHES MAXIMUM IN
mounting_hole_diameter0.104 INCHES MINIMUM AND 0.114 INCHES MAXIMUM IN
nut_mounting_provisionCOUNTERSUNK HOLES
mounting_provision_locationNUT PROJECTION SIDE
specification/standard_data26512-GS540H MANUFACTURERS STANDARD
NSN5310-01-083-4119
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: CA21057-1C · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
PLATE THICKNESS: 0.032 INCHES MINIMUM AND 0.038 INCHES MAXIMUM IN
•
NUT LENGTH: 0.905 INCHES MINIMUM AND 0.949 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-P-23377 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
PLATE WIDTH: 0.540 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN
•
MOUNTING HOLE ARRANGEMENT STYLE: 2 HOLES
•
MOUNTING HOLE COUNTERSINK ANGLE: 0.098 DEGREES MINIMUM AND 102.0 DEGREES MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-766,COND A FED SPEC ALL MATERIAL RESPONSES OVERALL
•
MOUNTING HOLE DIAMETER: 0.104 INCHES MINIMUM AND 0.114 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
PLATE THICKNESS0.032 INCHES MINIMUM AND 0.038 INCHES MAXIMUM IN
NUT LENGTH0.905 INCHES MINIMUM AND 0.949 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-P-23377 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
PLATE WIDTH0.540 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN
MOUNTING HOLE ARRANGEMENT STYLE2 HOLES
MOUNTING HOLE COUNTERSINK ANGLE0.098 DEGREES MINIMUM AND 102.0 DEGREES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766,COND A FED SPEC ALL MATERIAL RESPONSES OVERALL
MOUNTING HOLE DIAMETER0.104 INCHES MINIMUM AND 0.114 INCHES MAXIMUM IN
MOUNTING PROVISION LOCATIONNUT PROJECTION SIDE
SPECIFICATION/STANDARD DATA26512-GS540H MANUFACTURERS STANDARD
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
GS540H1Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is CA21057-1C?
CA21057-1C is a NUT SPACER,PLATE.
What parts can replace CA21057-1C?
There is 1 known substitute for CA21057-1C: GS540H1. Substitute compatibility should be verified for your specific system.
What is the NSN for CA21057-1C?
CA21057-1C is cataloged in the U.S. Government catalog under NSN 5310-01-083-4119. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.