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49040 — RAIL ASSEMBLY,RECOIL

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

49040: RAIL ASSEMBLY,RECOIL.

The RAIL ASSEMBLY,RECOIL is a the manufacturer industrial component. Key specifications include end_item_identification: MK48 MOD 1, part_name_assigned_by_controlling_agency: SHEET METAL GUIDE. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-089-0183, 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
49040
NSN: 5310-00-089-0183
NIINs: 000890183, 007719580, 013179561, 015586930
FSC: 5310 — Nuts and Washers
CAGE: 11599 — TRIUMPH ENGINE CONTROL SYSTEMS LLC (USA)
SPECIFICATIONS
end_item_identificationMK48 MOD 1
part_name_assigned_by_controlling_agencySHEET METAL GUIDE
NSN5310-00-089-0183
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 49040 · 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: 0.250 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5516 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
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CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
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SURFACE TREATMENT: PASSIVATE OVERALL
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PERIPHERAL SHAPE STYLE: ROUND
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MATERIAL: STEEL COMP 302 OVERALL
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CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.141 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.250 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5516 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTPASSIVATE OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 302 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.141 INCHES NOMINAL IN
THICKNESS0.017 INCHES MINIMUM AND 0.023 INCHES MAXIMUM IN
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 49040?
49040 is a RAIL ASSEMBLY,RECOIL.
What is the NSN for 49040?
49040 is cataloged in the U.S. Government catalog under NSN 5310-00-089-0183. 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.