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In automatic or centralized systems, these straight fittings are frequently screwed into manifold blocks, lubrication line compression bulkheads, or direct bearing caps to provide an immediate manual entry port for diagnostic testing or emergency auxiliary greasing if the main automatic pump fails.
Optimize your heavy-duty mechanical maintenance with the high-precision DIN 71412 Straight Grease Nipple manufactured by Fitsch. Engineered to meet rigorous global industrial benchmarks, this premium metal tapered thread zerk fitting ensures a leak-free, metal-to-metal hydraulic seal under extreme pressures.
Part No. | Description | ØD | G | L1 | L2 | SW1 | FRI |
SGN71412-M6KEG | GN-A M6x1 BS | 6,5 | M6x1 tap | 14,8 | 5,5 | 7 | 250-001 |
SGN71412-M8KEG | GN-A M8x1 BS | 6,5 | M8x1 tap | 15,5 | 5,5 | 9 | 250-002 |
SGN71412-M10KEG | GN-A M10x1 BS | 6,5 | M10x1 tap | 15,5 | 5,5 | 11 | 250-003 |
SGN71412-R2KEG | GN-A R1/8 BS | 6,5 | R1/8 tap | 15,5 | 5,5 | 11 | 250-004 |
SGN71412-R4KEG | GN-A R1/4 BS | 6,5 | R1/4 tap | 17,5 | 6,5 | 14 | 250-005 |
Thread Variant | Standard Pitch | Thread Length (L₁) | Total Length | Hex Size (Width Across Flats - SW) |
M6 x 1.0 tap | 1.0 mm (Coarse) | ~5.5 mm | ~15.0 mm | 7 mm |
M8 x 1.0 tap | 1.0 mm (Fine) | ~5.5 mm | ~15.0 mm | 9 mm |
M8 x 1.25 tap | 1.25 mm (Coarse) | ~5.5 mm | ~15.0 mm | 9 mm |
M10 x 1.0 tap | 1.0 mm (Fine) | ~5.5 mm | ~15.0 mm | 11 mm |
M10 x 1.5 tap | 1.5 mm (Coarse) | ~5.5 mm | ~15.0 mm | 11 mm |
R 1/8" tap | Pipe Thread (BSPT) | ~5.5 mm | ~15.0 mm | 11 mm |
Key Performance Features & Specifications:
Industry Standard Compliance: Built strictly to DIN 71412 Form A (H1) specifications for uniform international compatibility.
Premium Metal Construction: Choose from case-hardened galvanized steel with an anti-corrosion zinc finish or high-grade marine stainless steel.
High-Pressure Security: Rated for heavy-duty grease injection lines pushing up to 400 bar (5,800 PSI) operating pressure.
Self-Sealing Tapered Design: The conical male threads effortlessly secure into standard cylindrical mating holes without reliance on weak adhesives.
Integrated Pin-Valve / Ball Check: Features a robust internal spring-loaded check valve to block dust, moisture, and debris entry.
The primary characteristic of this component is its male tapered (conical) thread, which creates a metal-to-metal hydraulic seal when threaded into a standard cylindrical mating hole.
Core Technical Profile
Designation: DIN 71412 Form A (Straight with hexagonal body).
Head Type: Conical head (often called a hydraulic type), built to latch securely onto standard hydraulic couplers or high-pressure grease gun jaws.
Sealing Principle: The tapered external threads compress tightly into standard metric cylindrical internal threads (per DIN 158/DIN 13 standards), locking fluid pressure without always requiring external thread-locking compounds.
Dimensions & Thread Configurations
The standard thread sizes specified under DIN 71412 feature a tapered configuration (indicated by keg or tap in catalogs):Materials & Treatment
Because these fittings are regularly subjected to abrasive grease gun clamp forces, they are manufactured to strict industrial hardness scales:
Case-Hardened Steel: Minimum surface hardness of 550 HV 1, electro-zinc plated or galvanized for corrosion resistance.
Stainless Steel: Grade 1.4305 (303) or 1.4404 (316L) for food production, marine use, or highly acidic chemical plants.
