PartsTable
Technical Data Sheet

M12133/3-125 — WASHER,SPRING TENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

M12133/3-125: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 172 OVERALL, hole_diameter: 0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN, overall_height: 0.018 INCHES MINIMUM AND 0.024 INCHES MAXIMUM IN, hardness_rating: 350.0 VICKERS OR FIRTH DIAMOND PYRAMID MINIMUM AND 380.0 VICKERS OR FIRTH DIAMOND PYRAMID MAXIMUM, outside_diameter: 0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN, material_thickness: 0.0054 INCHES MINIMUM AND 0.0066 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-264-7626, 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
M12133/3-125
NSN: 5310-01-264-7626
FSC: 5310 — Nuts and Washers
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialCOPPER ALLOY 172 OVERALL
hole_diameter0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
overall_height0.018 INCHES MINIMUM AND 0.024 INCHES MAXIMUM IN
hardness_rating350.0 VICKERS OR FIRTH DIAMOND PYRAMID MINIMUM AND 380.0 VICKERS OR FIRTH DIAMOND PYRAMID MAXIMUM
outside_diameter0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
material_thickness0.0054 INCHES MINIMUM AND 0.0066 INCHES MAXIMUM IN
material_document_and_classificationASTM B194,1/4 HARD ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-264-7626
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: M12133/3-125 · 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
•
HARDNESS RATING: 350.0 VICKERS OR FIRTH DIAMOND PYRAMID MINIMUM AND 380.0 VICKERS OR FIRTH DIAMOND PYRAMID MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM B194,1/4 HARD ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.0054 INCHES MINIMUM AND 0.0066 INCHES MAXIMUM IN
•
MATERIAL: COPPER ALLOY 172 OVERALL
•
HOLE DIAMETER: 0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.018 INCHES MINIMUM AND 0.024 INCHES MAXIMUM IN
HARDNESS RATING350.0 VICKERS OR FIRTH DIAMOND PYRAMID MINIMUM AND 380.0 VICKERS OR FIRTH DIAMOND PYRAMID MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B194,1/4 HARD ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
MATERIAL THICKNESS0.0054 INCHES MINIMUM AND 0.0066 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY 172 OVERALL
HOLE DIAMETER0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 2
BS SP 134-BReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
MIL-W-12133/3Reference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is M12133/3-125?
M12133/3-125 is a WASHER,SPRING TENSION.
What parts can replace M12133/3-125?
There are 2 known substitutes for M12133/3-125: BS SP 134-B, MIL-W-12133/3. Substitute compatibility should be verified for your specific system.
What is the NSN for M12133/3-125?
M12133/3-125 is cataloged in the U.S. Government catalog under NSN 5310-01-264-7626. 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.