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3168778-1 — RETAINER,HELICAL COMPRESSION SPR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

3168778-1: RETAINER,HELICAL COMPRESSION SPR.

RETAINER,HELICAL COMPRESSION SPR. Key specifications include lip_thickness: 0.035 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN, overall_height: 1.140 INCHES MINIMUM AND 1.150 INCHES MAXIMUM IN, flange_diameter: 2.080 INCHES MINIMUM AND 2.100 INCHES MAXIMUM IN, flange_thickness: 0.035 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN, style_designator: IRREGULAR, end_hole_diameter: 1.260 INCHES MINIMUM AND 1.270 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-116-8183, 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
3168778-1
NSN: 5340-01-116-8183
FSC: 5340 — Hardware, Commercial
CAGE: 59364 — HONEYWELL INTERNATIONAL INC. DBA HONEYWELL INTERNATIONAL DIV AEROSPACE - TEMPE (WEST WARNER ROAD) (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 309 OR STEEL COMP 310 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317
lip_thickness0.035 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN
overall_height1.140 INCHES MINIMUM AND 1.150 INCHES MAXIMUM IN
flange_diameter2.080 INCHES MINIMUM AND 2.100 INCHES MAXIMUM IN
flange_thickness0.035 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
style_designatorIRREGULAR
end_hole_diameter1.260 INCHES MINIMUM AND 1.270 INCHES MAXIMUM IN
body_inside_diameter1.780 INCHES MINIMUM AND 1.800 INCHES MAXIMUM IN
body_outside_diameter1.990 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
NSN5340-01-116-8183
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3168778-1 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FLANGE DIAMETER: 2.080 INCHES MINIMUM AND 2.100 INCHES MAXIMUM IN
•
FLANGE THICKNESS: 0.035 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 1.990 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: IRREGULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763, CLASS 302 FED SPEC 1ST MATERIAL RESPONSE AND QQ-S-763, CLASS 321 FED SPEC 2ND MATERIAL RESPONSE AND QQ-S-763, CLASS 347 FED SPEC 3RD MATERIAL RESPONSE OR QQ-S-763 CL 304 OR 304L OR 305 OR 309 OR 310 OR 316 OR 316L OR 317 FED SPEC 4TH MATERIAL RESPONSE
•
BODY INSIDE DIAMETER: 1.780 INCHES MINIMUM AND 1.800 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER2.080 INCHES MINIMUM AND 2.100 INCHES MAXIMUM IN
OVERALL HEIGHT1.140 INCHES MINIMUM AND 1.150 INCHES MAXIMUM IN
FLANGE THICKNESS0.035 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER1.990 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
STYLE DESIGNATORIRREGULAR
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763, CLASS 302 FED SPEC 1ST MATERIAL RESPONSE AND QQ-S-763, CLASS 321 FED SPEC 2ND MATERIAL RESPONSE AND QQ-S-763, CLASS 347 FED SPEC 3RD MATERIAL RESPONSE OR QQ-S-763 CL 304 OR 304L OR 305 OR 309 OR 310 OR 316 OR 316L OR 317 FED SPEC 4TH MATERIAL RESPONSE
BODY INSIDE DIAMETER1.780 INCHES MINIMUM AND 1.800 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
LIP THICKNESS0.035 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN
MATERIALSTEEL COMP 302 OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 309 OR STEEL COMP 310 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3168778-1?
3168778-1 is a RETAINER,HELICAL COMPRESSION SPR.
What is the NSN for 3168778-1?
3168778-1 is cataloged in the U.S. Government catalog under NSN 5340-01-116-8183. 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.