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NS-4125 PIECE 4 4IN — Technical Data Sheet

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— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY R-405 OVERALL, pin_overall_length: 1.500 INCHES NOMINAL IN, pin_overall_diameter: 0.1250 INCHES NOMINAL IN, material_document_and_classification: QQ-N-281,CL B FED SPEC SINGLE MATERIAL RESPONSE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5315-01-190-7681, 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
NS-4125 PIECE 4 4IN
NSN: 5315-01-190-7681
FSC: 5315
CAGE: 11836 — NATIONAL OILWELL (USA)
SPECIFICATIONS
materialNICKEL ALLOY R-405 OVERALL
pin_overall_length1.500 INCHES NOMINAL IN
pin_overall_diameter0.1250 INCHES NOMINAL IN
material_document_and_classificationQQ-N-281,CL B FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5315-01-190-7681
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: NS-4125 PIECE 4 4IN · 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
•
MATERIAL: NICKEL ALLOY R-405 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281,CL B FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
PIN OVERALL DIAMETER: 0.1250 INCHES NOMINAL IN
•
PIN OVERALL LENGTH: 1.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
MATERIALNICKEL ALLOY R-405 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281,CL B FED SPEC SINGLE MATERIAL RESPONSE OVERALL
PIN OVERALL DIAMETER0.1250 INCHES NOMINAL IN
PIN OVERALL LENGTH1.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
30047InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
E1201-1-10InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
853926InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
32383InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2480348InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
5325PL0732926InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NS-4125 PIECE 4 4IN?
NS-4125 PIECE 4 4IN is a PIN,STRAIGHT,HEADLESS.
What parts can replace NS-4125 PIECE 4 4IN?
There are 15 known substitutes for NS-4125 PIECE 4 4IN: 30047, E1201-1-10, 853926 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for NS-4125 PIECE 4 4IN?
NS-4125 PIECE 4 4IN is cataloged in the Federal Logistics Information System under NSN 5315-01-190-7681. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: October 2026