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1287041-1 — WASHER,SPRING TENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1287041-1: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1095 OVERALL, hole_diameter: 1.320 INCHES MINIMUM AND 1.325 INCHES MAXIMUM IN, overall_height: 0.087 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN, hardness_rating: 43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM, outside_diameter: 2.244 INCHES NOMINAL IN, style_designator: SPRING TENSION. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-656-0206, 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
1287041-1
NSN: 5310-00-656-0206
FSC: 5310 — Nuts and Washers
CAGE: 55972 — HONEYWELL INTL INC DEFENSE AVIONICS SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL COMP 1095 OVERALL
hole_diameter1.320 INCHES MINIMUM AND 1.325 INCHES MAXIMUM IN
overall_height0.087 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
hardness_rating43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
outside_diameter2.244 INCHES NOMINAL IN
style_designatorSPRING TENSION
surface_treatmentCADMIUM AND CHROMATE OVERALL
material_thickness0.034 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-7947,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-S-171 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-S-171 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
NSN5310-00-656-0206
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1287041-1 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-S-171 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-S-171 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
•
HARDNESS RATING: 43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: SPRING TENSION
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-7947,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 2.244 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.034 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.087 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-S-171 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-S-171 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
HARDNESS RATING43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORSPRING TENSION
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-7947,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER2.244 INCHES NOMINAL IN
MATERIAL THICKNESS0.034 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
MATERIALSTEEL COMP 1095 OVERALL
HOLE DIAMETER1.320 INCHES MINIMUM AND 1.325 INCHES MAXIMUM 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 1
9053393Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1287041-1?
1287041-1 is a WASHER,SPRING TENSION.
What parts can replace 1287041-1?
There is 1 known substitute for 1287041-1: 9053393. Substitute compatibility should be verified for your specific system.
What is the NSN for 1287041-1?
1287041-1 is cataloged in the U.S. Government catalog under NSN 5310-00-656-0206. 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.