SL-STD-1420 - Superior Air Parts Slotted Hex Nut .3125-18
The SL-STD-1420 is a high-quality slotted hex nut designed and manufactured by Superior Air Parts, featuring a .3125-18 (5/16-18) thread size. This nut is engineered for critical aerospace applications, offering secure and reliable fastening in high-stress environments. The slotted design allows for the use of a cotter pin, ensuring the nut remains locked in place even under vibration and thermal expansion, making it ideal for aircraft construction and maintenance.
Specifications:
- Material: High-strength, corrosion-resistant steel
- Thread Size: .3125-18 (5/16-18) UNC (Unified National Coarse Thread)
- Type: Slotted hex nut
- Finish: Zinc plated or cadmium plated for enhanced corrosion resistance
- Height: Approximately 0.3125 inches (8 mm)
- Width Across Flats: Approximately 0.5625 inches (14.3 mm)
- Compliance: Meets or exceeds AN (Army-Navy) and NAS (National Aerospace Standards)
- Certification: Supplied with full traceability and certification documentation
Features:
- Superior Quality: Manufactured by Superior Air Parts to meet or exceed aerospace industry standards, ensuring compatibility and reliability in various aircraft applications.
- Slotted Design: The slotted hex design accommodates a cotter pin, preventing the nut from loosening under vibration, a critical feature in aviation assemblies.
- Corrosion Resistance: Constructed from high-strength steel and treated with a protective zinc or cadmium coating, the SL-STD-1420 nut is built to withstand harsh environmental conditions.
- Precision Engineering: Engineered to exacting specifications, ensuring a secure fit with .3125-18 bolts, reducing the risk of loosening and enhancing overall stability.
- Versatile Application: Suitable for both structural and non-structural aerospace assemblies, making it an essential component in aircraft maintenance and construction.
FAA PMA Part
Description: Nut, Hex Slotted
Part number: SL-STD-1420
FAA Eligibility: [ Click Here ]
Alternate to OEM Part Number: Lycoming STD-1420
What is a Slotted Nut Used for?
Slotted nuts are used in applications where vibration or motion might undo the locknut. Both a castle nut and slotted nut look similar, and can often be used interchangeably because they have almost identical dimensions.
Fits for Lycoming Engine models: [ Click Here ]
| • AEIO-360 | (-A1E, -B1G6, -H1A) | |
| • AEIO-540 | (-D4B5, -L1B5D) | |
| • AIO-320 | (-B1B, -C1B) | |
| • AIO-360 | (-A1A, -A1B, -B1B) | |
| • HIO-360 | A1A, -B1A, -C1A, -C1B, -D1A) | |
| • HO-360 | (-B1A, -B1B) | |
| • IO-320 | (-B1A, -B1C, -C1A, -D1A, -D1B, -E1A, -E1B, -E2A, -E2B) | |
| • IO-360 | (-A1A, -A1B, -A1B6, -A1C, -A1D, -A1D6, -A2A, -A2B, -B1A, -B1B, -B1D, -B1E, -B1F, -B2F, -B2F6, -B4A, -C1A, -C1B, -C1C, -C1C6, -C1D6, -C1E6, -C1F) | |
| • IO-540 | (-A1A5, -B1A5, -B1C5, -C1B5, -C4B5, -C4C5, -C4D5D, -D4A5,E1A5, -E1B5, -G1A5, -G1B5, -G1C5, -G1D5, -G1E5, -G1F5, -J4A5, -K1A5, -K1A5D, -K1B5, -K1C5, -K1D5, -K1E5, -K1F5, -K1F5D, -K1G5, -K1G5D, -K1J5, -K1J5D, -K1K5, -L1C5, -M1A5, -M1B5D, -N1A5, -P1A5, -R1A5, -S1A5, -T4A5D, -T4B5D, -T4C5D, -V4A5D, -W1A5D, -W3A5D, -AA1A5) | |
| • IO-720 | (-A1A, -A1B, -B1B, -B1BD, -C1B, -D1B, -D1C, -D1CD) | |
| • IVO-360 | (-A1A) | |
| • LIO-320 | (-B1A, -C1A) | |
| • LIO-360 | (-C1E6) | |
| • LTIO-540 | (-F2BD, -J2B, -J2BD, -N2BD, -R2AD, -U2A, -V2AD) | |
| • O-235 | (-C1, -C1B, -C1C, -C2A, -C2C, -F2A, -F2B, -H2C, -J2A, -J2B, -K2A, -K2B, -K2C, -L2A, -L2C, -M1, -N2A, -N2C, -P2A) | |
| • O-290 | (-D, -D2, -D2B, -D2C) | |
| • O-320 | (-A2A, -A2B, -A2C, -A2D, -A3A, -A3B, -A3C, -B2A, -B2B, -B2C, -B3A, -B3B, -B3C, -D1A, -D1D, -D1F, -D2A, -D2B, -D2C, -D2G, -D2J, -D3G, -E1A, -E1F, -E2A, -E2B, -E2C, -E2D, -E2F, -E2G, -E2H, -E3D, -E3H) | |
| • O-340 | (-A1A, -A2A, -B1A) | |
| • O-360 | (-A1A, -A1C, -A1D, -A1F6, -A1G6, -A2A, -A2D, -A2E, -A2F, -A2G, -A3A, -A4A, -A4G, -A4J, -A4K, -A4M, -A4N, -B2A, -C1A, -C1C, -C1E, -C1F, -C1G, -C2A, -C2C, -C2D, -C2E, -D2A, -D2B, -F1A6) | |
| • O-540 | (-A1A, -A1A5, -A1B5, -A1C5, -A1D, -A1D5, -A3D5, -B1A5, -B1B5, -B2B5, -B2C5, -B4B5, -E4A5, -E4B5, -E4C5, -F1A5, -F1B5, -G1A5, -G2A5, -H1B5D, -H2B5D, -J1A5D, -J3A5D, -J3C5D, -L3C5D) | |
| • TIGO-541 | (-E1A) | |
| • TIO-360 | (-A1B, -C1A6D) | |
| • TIO-540 | (-A1A, -A1B, -A2A, -A2B, -A2C, -C1A, -E1A, -F2BD, -G1A, -H1A, -J2B, -J2BD, -N2BD, -R2AD, -S1AD, -AA1AD, -AB1AD) | |
| • TIO-541 | (-A1A, -E1A4, -E1B4, -E1C4) | |
| • VO-360 | (-A1A, -A1B, -B1A) |
**Lycoming O-320, IO-320 LIO-320 Engines Parts Catalog [ Click Here ]
| Dimensions | |
|---|---|
| Dimensions (W x H x D) | 0.63" x 0.63" x 0.19" inches |
| Length | 0.63" inches |
| Weight | 0.15 lbs |
| Specifications | |
|---|---|
| 8130-3 Eligible | Yes |
| ATA Chapter | 71 ATA Power Plant |
| Available Conditions | NE / NS / OH / AR |
| Cage Code | 80254 |
| Country of origin | United States of America |
| ECCN / USML | 9A991.d |
| FAA Approval Code | PMA |
| Hazmat Code | Not Applicable |
| Hazmat(Y/N) | N |
| NSN | 5310-00-655-6824 |
| Schedule B | 8409.10.0040 |
| Total Shelf Life (days) | Not Applicable |
| Type | Nut |
| Units of Measure (UoM) | Each |
| Brand | Superior Air Parts |