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61957-2 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

61957-2: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, thickness: 0.062 INCHES NOMINAL IN, hole_diameter: 0.125 INCHES NOMINAL IN, overall_diameter: 1.125 INCHES NOMINAL IN, special_test_features: SPECIAL QUALITY CONTROL TESTING, peripheral_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-104-5933, 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
61957-2
NSN: 5310-01-104-5933
FSC: 5310 — Nuts and Washers
CAGE: 22525 — INSTRUMENTS AND FLIGHT RESEARCH, INC. (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
thickness0.062 INCHES NOMINAL IN
hole_diameter0.125 INCHES NOMINAL IN
overall_diameter1.125 INCHES NOMINAL IN
special_test_featuresSPECIAL QUALITY CONTROL TESTING
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
criticality_code_justificationZZZY
reference_number_differentiating_characteristicsAS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS
NSN5310-01-104-5933
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 61957-2 · 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
•
OVERALL DIAMETER: 1.125 INCHES NOMINAL IN
•
SPECIAL TEST FEATURES: SPECIAL QUALITY CONTROL TESTING
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
COLOR: WHITE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
TEST DATA DOCUMENT: 81349-MIL-P-23199 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
•
MATERIAL: RUBBER SYNTHETIC OVERALL
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER1.125 INCHES NOMINAL IN
SPECIAL TEST FEATURESSPECIAL QUALITY CONTROL TESTING
CRITICALITY CODE JUSTIFICATIONZZZY
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
COLORWHITE OVERALL
PERIPHERAL SHAPE STYLEROUND
TEST DATA DOCUMENT81349-MIL-P-23199 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
MATERIALRUBBER SYNTHETIC OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.125 INCHES NOMINAL IN
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 2
PO11045933Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
25151.28-2Reference document
Same NSN cross-reference
Reference document — Design control — primary 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 61957-2?
61957-2 is a WASHER,FLAT.
What parts can replace 61957-2?
There are 2 known substitutes for 61957-2: PO11045933, 25151.28-2. Substitute compatibility should be verified for your specific system.
What is the NSN for 61957-2?
61957-2 is cataloged in the U.S. Government catalog under NSN 5310-01-104-5933. This indicates validated use in U.S. government and defense supply chains.
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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.