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128BM11041-1 — WASHER,SHOULDERED AND RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

128BM11041-1: WASHER,SHOULDERED AND RECESSED.

The WASHER,SHOULDERED AND RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4340 OVERALL, hole_diameter: 0.375 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN, hardness_rating: 39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM, shoulder_height: 0.060 INCHES NOMINAL IN, outside_diameter: 1.000 INCHES NOMINAL IN, shoulder_diameter: 0.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-971-3386, 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
128BM11041-1
NSN: 5310-00-971-3386
FSC: 5310 — Nuts and Washers
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 4340 OVERALL
hole_diameter0.375 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
hardness_rating39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
shoulder_height0.060 INCHES NOMINAL IN
outside_diameter1.000 INCHES NOMINAL IN
shoulder_diameter0.750 INCHES NOMINAL IN
material_document_and_classificationMIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-971-3386
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 128BM11041-1 · 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
•
SHOULDER HEIGHT: 0.060 INCHES NOMINAL IN
•
HARDNESS RATING: 39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.000 INCHES NOMINAL IN
•
SHOULDER DIAMETER: 0.750 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 4340 OVERALL
•
HOLE DIAMETER: 0.375 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SHOULDER HEIGHT0.060 INCHES NOMINAL IN
HARDNESS RATING39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.000 INCHES NOMINAL IN
SHOULDER DIAMETER0.750 INCHES NOMINAL IN
MATERIALSTEEL COMP 4340 OVERALL
HOLE DIAMETER0.375 INCHES MINIMUM AND 0.385 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

No substitute or cross-reference records for this part.

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 128BM11041-1?
128BM11041-1 is a WASHER,SHOULDERED AND RECESSED.
What is the NSN for 128BM11041-1?
128BM11041-1 is cataloged in the U.S. Government catalog under NSN 5310-00-971-3386. 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.