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Technical Data Sheet
18817-1 ✓ Verified by PartsTable
· 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 RECEIVER,AUTOMATIC GUN is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, body_style: PLAIN, SOLID, teeth_type: SPUR, pitch_diameter: 5.0000 INCHES NOMINAL IN, pressure_angle: 20.0000 DEGREES, teeth_quantity: 120. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-015-1947, 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
18817-1
NSN: 5310-01-015-1947
FSC: 5310
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
body_stylePLAIN, SOLID
teeth_typeSPUR
pitch_diameter5.0000 INCHES NOMINAL IN
pressure_angle20.0000 DEGREES
teeth_quantity120
style_designatorPLAIN RING
attachment_methodMOUNTING HOLE
nominal_overall_length0.500 INCHES IN
nominal_outside_diameter6.960 INCHES IN
mounting_hole_nominal_diameter0.257 INCHES AXIALLY THROUGH BODY FIRST END IN
mounting_hole_type_and_quantity8 PLAIN AXIALLY THROUGH BODY FIRST END
NSN5310-01-015-1947
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 18817-1 · 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: QQ-C-320,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING: 39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
NUT COUNTERBORE DEPTH: 0.160 INCHES NOMINAL NUT IN
COUNTERSINK ANGLE: 90.0 DEGREES NOMINAL NUT
COUNTERBORE DIAMETER: 4.890 INCHES MINIMUM NUT IN
MATERIAL: STEEL OVERALL
NUT THICKNESS: 0.760 INCHES MAXIMUM IN
NUT DIAMETER: 5.640 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-C-320,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
NUT COUNTERBORE DEPTH0.160 INCHES NOMINAL NUT IN
COUNTERSINK ANGLE90.0 DEGREES NOMINAL NUT
COUNTERBORE DIAMETER4.890 INCHES MINIMUM NUT IN
MATERIALSTEEL OVERALL
NUT THICKNESS0.760 INCHES MAXIMUM IN
NUT DIAMETER5.640 INCHES NOMINAL IN
SURFACE TREATMENTCHROMIUM OVERALL
NOMINAL THREAD SIZE4.750 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
18817-1Interchangeable
interchangeable cross-reference
interchangeable
18817Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 18817-1?
18817-1 is a RECEIVER,AUTOMATIC GUN.
What parts can replace 18817-1?
There are 2 known substitutes for 18817-1: 18817-1, 18817. Substitute compatibility should be verified for your specific system.
What is the NSN for 18817-1?
18817-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-015-1947. This indicates validated use in U.S. government and defense supply chains.
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